Apparatus for projecting cinematograph pictures



May 19, 1925.

- o. A. A. TENOW 'APPARATUS r oR PROJECTING CINEMATOGRAPH PICTURES Filed March 5, 1924 2 Sheets-Sheet 1 I N V E NT 0 R: 0L0 ARV/'0 AxnssolvTFNOM/ ATTORNEVY 0. A. A. TENOW APPARATUS FOR PROJECTING CINEMATOGRAPHPICTURES Filed March 5, 1924' 2 Sheets-Sheet 2 IN VE NT OR: m /o MFLSm/vTEA aw Patented May 19,- 1925.

UN T-En, STAT S P TEN OFFICE, v

' ArPAm'r s Fen rRoJEc'rI-NG cI NEMAroqRAPH rrc'runns.

' Appliation'filed March 5, 1924. Serial N'o. 696,935.

To all whom it concern: v a

' Be it known that I, ()nor Anvrn AxnnssoN TENOW, a sub'ect of the Kingof Sweden, residing at tockholm, Sweden, have in- Ivented new and usefulIm 'rovements in Apparatus for Projecting inematograph- Pictures, ofwhich the following is a speci- I fication. v v

The present invention refers to anapparatus for projecting cinematographpictures.

The characteristics of the invention consist in phe fact that in thesame there is an optical system arrangedxin such a manner that a realoptic image of the film is'projected within the'a-pparatus. In theapparatus there can further be-arranged'a movable optic system in sucha'm'anner' that a real lmage of ever picture .on'the film-Which ismovable wit a constant-speed, in the apparatus occupies a definite,immovable posi' .tion.

only as anexample anapparatusgaccording to the invention in} Fig. 1 invertical longi tudinal" section'- and in. ig'.- 2 in plan view.

,' 1 is a film moving" past the picture open ing 2' with aconstant'speed, this film being illuminated by an optical systemofillunii" nation 3, 4 of a kho'wnki'nd. 5is a' rotating 'Iens whee1,preferably of aplanaticmeniscuses, which bymeans of gears" 6, 7', 8, 9-from the-propulsive device oi the film'receive 'sucha rotary speed inrelation to the 'cuses being made use of, their inner aplanatic pointsareall situated. on the axis'of the 1 0 lens-wheel, while their outer,"aplanatic points are rotatin roundthis axis. Be-

tween the filman the lens-wheel there is On the accompanying' drawingsisshown arranged a projection system 10, 1 whose power and positionare-chosen in such a manner that it'alohe projects the film uponAXELSSON- TENOWQOF s'rocxnom, SWEDEN, ASSIGNOR or ONE- H ALF T0 5 answerVIKTQR LEONARD Bosn or UITIESALA, SWEDEN.

"the point of intersection between thekoptical axis ofwthe system andthe outermost part while't ,nient' (caused by' the motion of the film),of the film -image thus projected has the same speed as the exterior orouter aplanatic points have in virtue of the rotation ofthe lens wheel.The image then remains at rest in the inner aplanatic point.- Thisstation ary image is projected upon the screen by means of theprojectionsystem'll, 12.

Should greater power of light and abetter quality otjimage be wanted, acorresponding aplaiiatic lens system may he used instead of. everyaplanatic meniscus;

1''What Iclaimis: v 3 a An apparatus for projecting cinematographpictures comprising, in combination,

a film, mea'ns for'moving said film with a (constantspeed, a rotatingwheel of aplanat-ic lenses for compensating the wandering of thepictures, and a projecting s stem dispose between the film and theens-wheel, the power and position of said system being chosen in such amanner thatit aloneiproof the pathof the exterior aplanatic points, I

e enlargement is'such' that the movejects thefilm upon the point ofintersection between the-optical axis of the said projection system andthe outermost part of the path'of the exterior apla'natic points,;whilethe enlargement is such that the movement image thus p'rojected'has thesame speed as the outer aplanatic points have by virtue of the rotationof the lens-Wheel;

name to this specification.

oior ARVID AXELSSON TENOW.

caused by .theiiiotion of the film of the film- In testimony whereof Ihave signed my

